Adsorbent cartridge assembly with end cap

1. An integrated, self-supporting adsorbent cartridge assembly for removing carbon dioxide contaminant, comprising:

(a) an adsorbent cartridge, comprising an adsorbent sheet wound into a roll, wherein the adsorbent sheet is formed from a mixture comprising a polymer and an adsorbent, wherein the sheet is spaced to form multiple layers by ribs protruding from the sheet and molded directly out of the adsorbent sheet, wherein said sheet wound into a roll comprises a first open end face, a second open end face, and an outer portion; wherein:

the adsorbent comprises calcium hydroxide or lithium hydroxide;

the adsorbent cartridge does not comprise a rigid outer housing;

the open end faces are at opposite ends of the cartridge;

said layers are disposed orthogonally with respect to the open end faces; and

said layers are mechanically spaced so as to allow gas flow between said layers;

and

(b) an end cap secured around said first open end face, wherein said end cap allows gas flow through said first open end face, comprising:

an outer sleeve circumscribing the outer portion of one end of the cartridge adjacent to said first open face; wherein said outer sleeve has a portion protruding beyond said one end of the cartridge; and the protruding portion comprises an inner surface;

wherein the assembly has mechanical integrity during transportation and installation.

2. The assembly of claim 1 , wherein said outer sleeve further comprises one or more supporting members extending from the inner surface of the protruding portion of the outer sleeve and protruding at least partially over the first open end face.

3. The assembly of claim 2 , wherein the one or more supporting members is a single member circumscribing the inner surface of the protruding portion of the outer sleeve.

4. The assembly of claim 2 , wherein:

the end cap further comprises an inner hub aligned over the center of said first open end face; and

the one or more supporting members comprise a plurality of radial ribs connecting the inner hub to the inner surface of the protruding portion of the outer sleeve.

5. The assembly of claim 4 , wherein said plurality of radial ribs are arranged substantially equidistant from each other.

6. The assembly of claim 4 , wherein the inner hub is a disc.

7. The assembly of claim 4 , wherein the inner hub is a ring.

8. The assembly of claim 1 , wherein the roll has an inner core, parallel to gas flow and perpendicular to the open end faces; wherein said inner core is coaxial to the outer portion of the roll.

9. The assembly of claim 8 , wherein the inner core is solid.

10. The assembly of claim 8 , wherein the inner core is hollow.

11. The assembly of claim 8 , wherein:

the end cap further comprises a hub centered over the inner core; and

the outer sleeve further comprises one or more supporting members extending from the inner surface of the protruding portion of the outer sleeve and protruding at least partially over the first open end face where the one or more supporting members comprise a plurality of radial ribs connecting the inner hub to the inner surface of the protruding portion of the outer sleeve.

12. The assembly of claim 11 , wherein:

the hub comprises a ring arranged concentrically to the outer sleeve; and

the one or more supporting members comprise a plurality of radial ribs connecting the inner ring to the inner surface of the protruding portion of the outer sleeve.

13. The assembly of claim 12 , wherein the assembly further comprises a plug inserted into the ring.

14. The assembly of claim 12 , further comprising core plugs inserted into the ring in opposing directions so as to connect more than one cartridge in series.

15. The assembly of claim 11 , wherein:

the hub comprises a disc arranged concentrically to the outer sleeve; and

the one or more supporting members comprise a plurality of radial ribs connecting the inner ring to the inner surface of the protruding portion of the outer sleeve.

16. The assembly of claim 11 , wherein:

the inner core is hollow;

the inner hub comprises an inner sleeve inserted into the inner core; and

the one or more supporting members comprise a plurality of radial ribs connecting the inner sleeve to the inner surface of the protruding portion of the outer sleeve.

17. The assembly of claim 11 , wherein:

the inner core is hollow;

the inner hub comprises a plug inserted into the inner core; and

the one or more supporting members comprise a plurality of radial ribs connecting the plug to the inner surface of the protruding portion of the outer sleeve.

18. The assembly of claim 11 , wherein the hub has substantially the same dimension as the inner core of the roll.

19. The assembly of claim 1 , wherein the cartridge further comprises a foam or sealing material covering at least a portion of an outer layer of the roll.

20. The assembly of claim 1 , wherein the cartridge further comprises a foam or sealing material inserted under an outer layer of the roll.

21. The assembly of claim 1 , wherein the end cap is secured to said first open end face by any method chosen from the group of: ultrasonic welding, shrink-wrapping, adhesives, and molding.

22. The assembly of claim 1 , wherein the end cap is secured to the first open end face by a shrink wrap covering the outer portion of the cartridge and at least a portion of the outer sleeve.

23. The assembly of claim 1 , wherein the outer sleeve tapers in the direction of the protruding portion allowing the end cap to be secured to the cartridge without any external securer.

24. The assembly of claim 1 , wherein the outer sleeve further comprises a groove circumscribing the outer portion of the outer sleeve.

25. The assembly of claim 24 , wherein the end cap is secured to said first open end face by a shrink wrap covering the outer portion of said cartridge and extending into the groove.

26. The assembly of claim 1 , further comprising a cone secured around the outer sleeve, wherein said cone comprises an opening with a smaller diameter than the first open end face.

27. The assembly of claim 26 , wherein the outer sleeve further comprises a groove circumscribing the inner surface of the protruding portion of the outer sleeve; and the cone further comprises a protrusion on an outer surface of the cone, which locks into the groove.

28. The assembly of claim 26 , further comprising a sealant disposed between the cone and the inner surface of the protruding portion of the outer sleeve.

29. The assembly of claim 28 , wherein the sealant is an o-ring.

30. The assembly of claim 8 , wherein the inner core is hollow; and wherein said assembly further comprises a dome secured around the outer sleeve.

31. The assembly of claim 1 , wherein the end cap is made from materials capable of absorbing shocks and/or contains flexible material suitable for making sealing attachment of the end cap to the cartridge.

32. The assembly of claim 1 , wherein the cartridge has more than one axially extended channel within its interior through which gas can flow.

33. The assembly of claim 1 , wherein the end cap further comprises means to promote a uniform flow of air across a cross-sectional surface of the cartridge.

34. The assembly of claim 33 , wherein the said means is selected from the group of a flow deflector plate, a filter, a ring with sloping ribs and a disc.

35. The assembly of claim 1 , wherein:

the roll has an inner core, parallel to gas flow and perpendicular to the open end faces, said inner core being coaxial to the outer portion of the roll;

the end cap further comprises an inner sleeve inserted into the inner core of the roll; and a plurality of radial ribs arranged substantially equidistant from each other connecting the inner sleeve to the inner surface of the protruding portion of the outer sleeve;

wherein the end cap further comprises a sealing ring co-molded to the inner surface of the protruding portion of the outer sleeve, the sealing ring surrounding the entire inner circumference of the outer sleeve, wherein the sealing ring is of a different material than the remainder of the end cap.

36. The assembly of claim 35 , wherein said sealing ring comprises a thermoplastic rubber; and the remainder of the end cap comprises a high density polyethylene.

37. The assembly of claim 1 , further comprising a second end cap secured around the second open end face, comprising:

an outer sleeve circumscribing the outer portion of an end of the cartridge adjacent to said second open face; wherein said outer sleeve has a portion protruding beyond the end of the cartridge adjacent to said second open face; and the protruding portion comprises an inner surface.

38. The assembly of claim 1 , wherein the cartridge assembly is suitable for medical applications.